"hello everyone !
I bought RFD900+ yesterday and still cannot connect with genuine 3dr modems.
net id are the same etc , FW is V1.9 on both of them.....
RFD tools V1.6 crashes some time....(Win10)
"more or less deltawings are more sensitive to winds and more difficult to fly.
i think that apm or pixhawk cannot easy handle stalls, although they have STALL_PREVENTION."